Deprecate vector layer ctor with default constructed options

replaced by QgsVectorLayer( const QgsVectorLayer::LayerOptions &options,
...

python/core/auto_generated/qgsvectorlayer.sip.in

@@ -326,11 +326,22 @@ TODO QGIS3: Remove virtual from non-inherited methods (like isModified)
     struct LayerOptions
     {
 
-      explicit LayerOptions( bool loadDefaultStyle = true,
-                             bool readExtentFromXml = false,
-                             const QgsCoordinateTransformContext &transformContext = QgsCoordinateTransformContext() );
+ explicit LayerOptions( bool loadDefaultStyle = true,
+          bool readExtentFromXml = false );
 %Docstring
 Constructor for LayerOptions.
+
+.. deprecated:: Use version with transformContext argument instead
+%End
+
+          explicit LayerOptions( const QgsCoordinateTransformContext & transformContext,
+                                 bool loadDefaultStyle = true,
+                                 bool readExtentFromXml = false
+                               );
+%Docstring
+Constructor for LayerOptions.
+
+.. versionadded:: 3.10
 %End
 
       bool loadDefaultStyle;
@@ -341,8 +352,8 @@ Constructor for LayerOptions.
 
     };
 
-    explicit QgsVectorLayer( const QString &path = QString(), const QString &baseName = QString(),
-                             const QString &providerLib = "ogr", const QgsVectorLayer::LayerOptions &options = QgsVectorLayer::LayerOptions() );
+ explicit QgsVectorLayer( const QString &path = QString(), const QString &baseName = QString(),
+        const QString &providerLib = "ogr", const QgsVectorLayer::LayerOptions &options = QgsVectorLayer::LayerOptions() ) /Deprecated/;
 %Docstring
 Constructor - creates a vector layer
 
@@ -355,6 +366,27 @@ data.
 :param baseName: The name used to represent the layer in the legend
 :param providerLib: The name of the data provider, e.g., "memory", "postgres"
 :param options: layer load options
+
+.. deprecated:: Use version with options as mandatory argument instead
+%End
+
+
+    explicit QgsVectorLayer( const QgsVectorLayer::LayerOptions &options, const QString &path = QString(), const QString &baseName = QString(),
+                             const QString &providerLib = "ogr" );
+%Docstring
+Constructor - creates a vector layer
+
+The QgsVectorLayer is constructed by instantiating a data provider.  The provider
+interprets the supplied path (url) of the data source to connect to and access the
+data.
+
+:param options: layer load options
+:param path: The path or url of the parameter.  Typically this encodes
+             parameters used by the data provider as url query items.
+:param baseName: The name used to represent the layer in the legend
+:param providerLib: The name of the data provider, e.g., "memory", "postgres"
+
+.. versionadded:: 3.10
 %End
 
 

src/app/qgisapp.cpp

@@ -4708,7 +4708,7 @@ bool QgisApp::addVectorLayersPrivate( const QStringList &layerQStringList, const
     const bool isRemoteUrl { scheme.startsWith( QStringLiteral( "http" ) ) || scheme == QStringLiteral( "ftp" ) };
 
     // create the layer
-    QgsVectorLayer::LayerOptions options;
+    QgsVectorLayer::LayerOptions options { QgsProject::instance()->transformContext() };
     options.loadDefaultStyle = false;
     if ( isVsiCurl || isRemoteUrl )
     {
@@ -5254,7 +5254,7 @@ QList<QgsMapLayer *> QgisApp::askUserForOGRSublayers( QgsVectorLayer *layer )
 
     QgsDebugMsg( "Creating new vector layer using " + composedURI );
     QString name = fileName + " " + def.layerName;
-    QgsVectorLayer::LayerOptions options;
+    QgsVectorLayer::LayerOptions options { QgsProject::instance()->transformContext() };
     options.loadDefaultStyle = false;
     QgsVectorLayer *layer = new QgsVectorLayer( composedURI, name, QStringLiteral( "ogr" ), options );
     if ( layer && layer->isValid() )
@@ -5318,7 +5318,7 @@ void QgisApp::addDatabaseLayers( QStringList const &layerPathList, QString const
     // create the layer
     QgsDataSourceUri uri( layerPath );
 
-    QgsVectorLayer::LayerOptions options;
+    QgsVectorLayer::LayerOptions options { QgsProject::instance()->transformContext() };
     options.loadDefaultStyle = false;
     QgsVectorLayer *layer = new QgsVectorLayer( uri.uri( false ), uri.table(), providerKey, options );
     Q_CHECK_PTR( layer );
@@ -11108,7 +11108,7 @@ QgsVectorLayer *QgisApp::addVectorLayerPrivate( const QString &vectorLayerPath,
   }
 
   // create the layer
-  QgsVectorLayer::LayerOptions options;
+  QgsVectorLayer::LayerOptions options { QgsProject::instance()->transformContext() };
   // Default style is loaded later in this method
   options.loadDefaultStyle = false;
   QgsVectorLayer *layer = new QgsVectorLayer( vectorLayerPath, baseName, providerKey, options );

src/core/qgsvectorlayer.cpp

@@ -139,6 +139,7 @@ typedef bool deleteStyleById_t(
 );
 
 
+
 QgsVectorLayer::QgsVectorLayer( const QString &vectorLayerPath,
                                 const QString &baseName,
                                 const QString &providerKey,
@@ -148,7 +149,6 @@ QgsVectorLayer::QgsVectorLayer( const QString &vectorLayerPath,
   , mAuxiliaryLayerKey( QString() )
   , mReadExtentFromXml( options.readExtentFromXml )
 {
-
   setProviderType( providerKey );
 
   mGeometryOptions = qgis::make_unique<QgsGeometryOptions>();
@@ -179,8 +179,8 @@ QgsVectorLayer::QgsVectorLayer( const QString &vectorLayerPath,
   mSimplifyMethod.setThreshold( settings.value( QStringLiteral( "qgis/simplifyDrawingTol" ), mSimplifyMethod.threshold() ).toFloat() );
   mSimplifyMethod.setForceLocalOptimization( settings.value( QStringLiteral( "qgis/simplifyLocal" ), mSimplifyMethod.forceLocalOptimization() ).toBool() );
   mSimplifyMethod.setMaximumScale( settings.value( QStringLiteral( "qgis/simplifyMaxScale" ), mSimplifyMethod.maximumScale() ).toFloat() );
-} // QgsVectorLayer ctor
 
+} // QgsVectorLayer ctor
 
 
 QgsVectorLayer::~QgsVectorLayer()

src/core/qgsvectorlayer.h

@@ -400,11 +400,23 @@ class CORE_EXPORT QgsVectorLayer : public QgsMapLayer, public QgsExpressionConte
 
       /**
        * Constructor for LayerOptions.
+       * \deprecated Use version with transformContext argument instead
        */
-      explicit LayerOptions( bool loadDefaultStyle = true,
-                             bool readExtentFromXml = false,
-                             const QgsCoordinateTransformContext &transformContext = QgsCoordinateTransformContext() )
+      Q_DECL_DEPRECATED explicit LayerOptions( bool loadDefaultStyle = true,
+          bool readExtentFromXml = false )
         : loadDefaultStyle( loadDefaultStyle )
+        , readExtentFromXml( readExtentFromXml ) SIP_DEPRECATED
+          {}
+
+          /**
+           * Constructor for LayerOptions.
+           * \since QGIS 3.10
+           */
+          explicit LayerOptions( const QgsCoordinateTransformContext & transformContext,
+                                 bool loadDefaultStyle = true,
+                                 bool readExtentFromXml = false
+                               )
+            : loadDefaultStyle( loadDefaultStyle )
         , readExtentFromXml( readExtentFromXml )
         , transformContext( transformContext )
       {}
@@ -438,9 +450,28 @@ class CORE_EXPORT QgsVectorLayer : public QgsMapLayer, public QgsExpressionConte
      * \param baseName The name used to represent the layer in the legend
      * \param providerLib  The name of the data provider, e.g., "memory", "postgres"
      * \param options layer load options
+     * \deprecated Use version with options as mandatory argument instead
      */
-    explicit QgsVectorLayer( const QString &path = QString(), const QString &baseName = QString(),
-                             const QString &providerLib = "ogr", const QgsVectorLayer::LayerOptions &options = QgsVectorLayer::LayerOptions() );
+    Q_DECL_DEPRECATED explicit QgsVectorLayer( const QString &path = QString(), const QString &baseName = QString(),
+        const QString &providerLib = "ogr", const QgsVectorLayer::LayerOptions &options = QgsVectorLayer::LayerOptions() ) SIP_DEPRECATED;
+
+
+    /**
+     * Constructor - creates a vector layer
+     *
+     * The QgsVectorLayer is constructed by instantiating a data provider.  The provider
+     * interprets the supplied path (url) of the data source to connect to and access the
+     * data.
+     *
+     * \param options layer load options
+     * \param path  The path or url of the parameter.  Typically this encodes
+     *               parameters used by the data provider as url query items.
+     * \param baseName The name used to represent the layer in the legend
+     * \param providerLib  The name of the data provider, e.g., "memory", "postgres"
+     * \since QGIS 3.10
+     */
+    explicit QgsVectorLayer( const QgsVectorLayer::LayerOptions &options, const QString &path = QString(), const QString &baseName = QString(),
+                             const QString &providerLib = "ogr" );
 
 
     ~QgsVectorLayer() override;